Trolley base



W. J. LEWIS Nov. 4, 1952 TROLLEY BASE Filed Aug. 19, 195o INVENToR.MBREN LEWIS BY ATTORNEY Patented Nov. 4, 1952 UNITED STI'ATE-S PAT IOF FI CE l s TROLLEY BASE 1 A2"ilva:freni-J hevvis,Mansfield, Ohio, assgnortr'lhe Ohidf-Bifass ldmpany, Mansfield..r Ohio, a con- ..porationof NewJersey Application August 11,9, 1950',^?Serial1.Nu'; :18I1,457

ZClaims.

This invention relates to trlley basesand has particular reference to abase which is specially adapted for4 use on mine locomotives.

f I t YhasY been observed Athatthe presentlday trolley bases in mine useare` very sluggishv in action andthis was traced toth high pressure uponthe bearings made necessary by the extremely short coupled springs insuch bases.

In my improved base I make use of a steel spring either preloaded or ofopen coil construction as the entire support for the trolley polewithout the use of bearings in its vertical movement.

This form of construction reduces friction to a point where it ispractically eliminated or at least negligible.

In the drawing:

Fig. 1 is a side view in elevation of my trolley base.

Fig. 2 is another side view of my trolley base taken at right angles tothe view in Fig. 1.

Fig. 3 is a view in partial section taken on the line 3-3 of Fig. 2 anddiscloses a trolley pole associated therewith.

Fig. 4 is a view similar to Fig. 3 of a modified construction.

In the preferred construction is shown a pedestal base I for attachmentto the locomotive; mounted thereon is a ball bearing race 2 for ease ofrotation of the turret 3 about a vertical axis.

The inner portion of the race is secured to the pedestal of the base andthe outer portion is secured to the turret so that the two portionsrotate relative to each other when the turret rotates relative to thebase.

The turret 3 has an inverted cup-shaped portion 4 which encloses thepedestal portion of the base I and has an obliquely disposed sleeve-likeportion 5 integral With the portion 4. The axis a-b of the sleeve-likeportion intersects the Vertical axis of rotation :1J-y of the base i atthe point o above the base.

The wall at the opening 6 through the sleevelike portion 5 is formedwith a spiral groove 'I conforming to the pitch and diameter of thecoils forming the supporting spring 8 which has one end mounted in thesleeve portion 5 by rotation as in the case of a bolt in a threadedopening.

Mounted on the other end of the spring 8 is a pole support 9 which has aspring socket portion Il and a pole socket portion II. The recess I2 inthe spring socket portion I is provided with a helical groove I3, as inthe case of the sleevelike portion 5, in which recess I2 is mounted thesaid other end' of the spring 8.

v The 4pole-.socket portion 'I .I hase. plain stubular passage`iii-which lis--fposticned the flower E@11d 0f a trolley polel M to they.extreme. upper .gend Vof which may be-errlcllrlec1-av .currentColleir.. .new ommonpracticef 'f fllierolemay beheld inplaebr-afths01ieh lh01tr-le5 V With the description of the base as abovedescribed the spring 8 and pole support 9 will take a positioncorresponding to the oblique axis a-b of the sleeve-like portion 5.

To pretension the spring and give the trolley pole a position morenearly that when it is in service, a cover I6 encloses most of the baseand spring and a portion of the pole support (Fig. 3) and has a stopmeans.

The cover has two spaced side Walls 20 connected along one side and partof the top by a Wall 2 i. The cover is secured in position by capscrews22 which are secured to the sleeve-like portion 5 and by cap-screws 23secured to the portion 4 of the turret. The side opposite the wall 2| isopen to permit the pole support and spring to be moved down from theirstop position.

The portion 2| of the cover extends to a point 2e, determined by therake desired for the trolley pole to take when the current collector isnot in engagement With the trolley wire; the point 24 acts as a stop forthe trolley pole should it inadvertently leave the trolley Wire. Whenthe pole is in service the support 9 is of course spaced from the stop24 and the angle of the pole with the vertical axis of the base I isgreater than that shown in Figs. 3 and 4.

The cover being secured to the turret and to the portion 5 will rotatewith the turret about its vertical axis and the side walls 20 willmaintain the pole and spring 8 in a vertical plane through the verticalaxis :c-y of the base.V

The base is simple in construction and operation and inexpensive tomaintain in good repa1r.

The modified base shown in Fig. 4 is like that of Fig. 3 except therelation of parts is such that the coils of the spring 8' are closed onthe com pressed side when the pole is in its stop position` Havingdescribed my invention what I wish to protect is set forth in thefollowing claims.

I claim:

l. A trolley base which includes in combination a base, a turret mountedon the base for easy rotation relative to the base, a spring socketintegral with the turret and obliquely disposed with respect to theturret so that the axis of the socket intersects the axis of the turretat ay 3 point above the turret, a coiled spring one end of which is inthe socket, a pole support attached to the other end of the spring, theaxis of the pole support lying in the same plane as the axis of thespring socket and the axis of the turret. vertical guide means confiningto said plane the movement of the pole vsupport when the spring is exed,and a stop Ywhich limits the upward unflexing of the spring, the stopbeing on the same side of the turret as the spring socket whereby at alltimes the axis of the spring socket makes an acute angle with the axisof the pole support and the spring is thereby exed and held undertension. l

2. A trolley base which includes in combination a base, a turret mountedon the base for easy rotation relative to the base, aj spring socketintegral with the turret and obliquely disposed with respect to theturret so that the axis of the socket intersects the axis of the turretat a point above the turret, a coiled spring one end of which is in thesocket, a pole support attached to the other end of thefspring, the axisof the pole support lying in the same plane as the axis of the springsocket and the axis of the turret, and a cover for the turret and springsocket provided with a vertical opening in said plane for movement ofthe pole support therein when the spring is flexed, the top of theopening forming a stop which limits the upward unflexing of the spring.the stop being on the same side of the turret as the spring socketwhereby at all times the axis of the spring socket makes an acute anglewith theV axis of the pole support and the spring is thereby exed andheld under tension.

WARREN J. LEWIS.

REFERENCES CITED The following references are of record in the nie ofthis patent:

UNITED STATES PATENTS Number Name Date 347,901 Van Depoele Aug. 24, 1886396,618 Short Jan. 22, 1889 435,166 Atwood Aug. 26, 1890 452,186 JonesMay 12, 1891 466,807 Sperry Jan. 12, 1892 691,236 Buckley et al Jan. 14,1902 708,559 Jenney Sept. 9. 1902 933,505 Volk Sept. 7, 1909

